Home / 20,777.37-28,674.85-12,393.87

Finding the Fourth Proportional to 20,777.37, 28,674.85 and 12,393.87

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Solution

The fourth proportional to 20,777.37, 28,674.85 and 12,393.87 is: 17,104.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.37 : 28,674.85 = 12,393.87 : x
  2. Step 2: Convert to fraction form
    20,777.37/28,674.85 = 12,393.87/x
  3. Step 3: Cross multiply
    20,777.37x = 28,674.85 × 12,393.87
  4. Step 4: Simplify right side
    20,777.37x = 355,392,486.19
  5. Step 5: Solve for x
    x = 355,392,486.19/20,777.37
  6. Step 6: Final answer
    x = 17,104.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.